Building Large Java Projects Faster: Multicore javac and Makefile Integration

The makefiles for the OpenJDK have begun to show their age. They were slow, did not allow for incremental builds, and created a high barrier of entry for new developers who wanted to join the OpenJDK development community.
It took one year to achieve, but now the new makefiles are in the OpenJDK
and the build times have been reduced by a factor of 5 and support efficient
incremental builds. This presentation explains and demonstrates the new makefiles and how you can put this new technology to use in your own projects.

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